My actual rating is -1* This app is a danger to domestic Dimplex users. As adding a heater to the app, requires them to keep removing a hardwired product from the wall, while it is live and powered on. Something that not even a qualified electrician should be doing! First, to scan the QR code hidden there. Then again, to read a pin code, which has to entered manually. A totally ridiculous and unnecessary step. As when the QR was scanned, the pin needed, was displayed on screen!